Finding the Fourth Proportional to 1,618.54, 2,428.86 and 888.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.54 : 2,428.86 = 888.63 : x
2. Step 2: Convert to fraction form
   1,618.54/2,428.86 = 888.63/x
3. Step 3: Cross multiply
   1,618.54x = 2,428.86 × 888.63
4. Step 4: Simplify right side
   1,618.54x = 2,158,357.86
5. Step 5: Solve for x
   x = 2,158,357.86/1,618.54
6. Step 6: Final answer
   x = 1,333.52